小型LNG气化站冷能回收用于站内空调系统的研究

发布时间：2018-04-26 13:17

本文选题：小型LNG气化站 + 分析　；参考：《华中科技大学》2014年硕士论文

【摘要】：近年来，液化天然气（LNG）作为一种绿色能源，便于储存和运输，，在加速我国天然气事业的发展中起着积极推动的作用，随之会迎来小型LNG气化站建设的高峰期。LNG蕴含着大量的冷能，但小型LNG气化站受到自身规模、地理位置和下游产业链等因素的限制，很少有实际利用方案投入小型LNG气化站的冷能利用回收中。所以研究适合小型LNG气化站冷能利用方案，对节约能源有着积极推动作用，具有很好的现实经济意义，同时也将成为研究LNG技术的热点问题。本课题以小型液化天然气（LNG）气化站为研究对象，确定分析法，分析影响LNG气化过程中冷能的因素。分析小型LNG气化站自身特点及其冷能利用存在的问题和注意事项，收集国内LNG冷能回收的主要利用方案，结合小型LNG气化站自身特点、周边环境、市场潜力及经济性等因素，秉着“因地适宜”原则进行全方位评价，分析各种冷能利用方案的优缺点和可行性。本文提出将小型LNG气化站回收冷能用于自身站内建筑物的空调系统，以达到节约能源的目的。在小型LNG气化站原有的气化工艺流程的基础上，构建冷能回收系统，分析系统中各个环节和设置蓄水池的必要性，确定换热器的类型，针对LNG逐时气化和建筑逐时冷负荷之间的各自独立性，重点分析不同工况下系统的运行策略，讨论换热器的运行模式。最后，笔者以参与过的某一实际小型LNG气化站为例进行分析，利用能耗模拟软件DEST对气化站内建筑进行逐时冷负荷模拟，同时计算气化站LNG逐时气化回收冷量，通过实际数据分析了供需冷量的负荷匹配问题及不同运行工况下的运行策略。本文构建冷能回收利用系统，为小型LNG气化站冷能利用方式提供一种选择，为该系统的运行策略提供理论基础和一定的指导作用。
[Abstract]:In recent years, liquefied natural gas (LNG), as a green energy, is easy to store and transport, and plays an active role in accelerating the development of natural gas industry in China. There is a lot of cold energy in the peak period of the construction of small LNG gasification station. However, the small LNG gasification station is limited by its own scale, geographical location and downstream industry chain, etc. Few practical utilization schemes have been applied to the cold energy recovery of small LNG gasification stations. Therefore, the study of cold energy utilization scheme suitable for small LNG gasification station has a positive role in promoting energy conservation, and has a good practical and economic significance, and will also become a hot issue in the research of LNG technology. In this paper, the small liquefied natural gas (LNG) gasification station is taken as the research object, the analysis method is determined and the factors influencing the cold energy in the LNG gasification process are analyzed. This paper analyzes on the characteristics of small LNG gasification station and the problems and matters needing attention in the utilization of cold energy, collects the main utilization schemes of domestic LNG cold energy recovery, and combines with the characteristics, surrounding environment, market potential and economy of the small LNG gasification station, etc. This paper analyzes the advantages, disadvantages and feasibility of various cold energy utilization schemes. In this paper, a small LNG gasification station is proposed to recover cold energy for air conditioning system of buildings in its own station, in order to save energy. On the basis of the original gasification process of small LNG gasification station, a cold energy recovery system was constructed, and the necessity of setting up storage tank and each link of the system were analyzed, and the type of heat exchanger was determined. Aiming at the independence between LNG hourly gasification and building hourly cooling load, the operation strategy of the system under different operating conditions is analyzed, and the operation mode of heat exchanger is discussed. Finally, taking a practical small LNG gasification station as an example, the author uses the energy consumption simulation software DEST to simulate the hourly cooling load of the buildings in the gasification station, and calculates the hourly gasification and recovery cooling rate of the LNG gasification station. Through the actual data, the load matching problem of supply and demand cooling quantity and the operation strategy under different operating conditions are analyzed. In this paper, a cold energy recovery and utilization system is constructed, which provides a choice for the utilization mode of cold energy in a small LNG gasification station, and provides a theoretical basis and a certain guiding role for the operation strategy of the system.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU831

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